Mapping List of Strings to floating numbers - Python

Question

I need to map country list in to floating number list.

country_list = ['China','India','Japan',...etc]

Mapping should be like following. (Just an example).

China  0.1
India  0.2
Japan  0.3
....   ...
....   1.0
....   1.1
....   ...
....   2.0

What is the most quick way doing this with Python.

Related Questions : Python Map List of Strings to Integer List

Wait, what? You suspect that there is a duplicate to your question, and you post it anyway? Why? :| — BartoszKP
– BartoszKP, Commented Mar 27, 2014 at 11:20
Mapping to what? where are those numebrs? in a list with the same indexes? If that is yes, use zip, someone mentioned that in the response you linked to. — Raul Guiu
– Raul Guiu, Commented Mar 27, 2014 at 11:21
@BartoszKP: That is different from what I need, but it addresses a similar question, That is why I indicated it. — Nilani Algiriyage
– Nilani Algiriyage, Commented Mar 27, 2014 at 11:22
@Raul Guiu : I need to map it to floating points starting 0.1 to ..n? — Nilani Algiriyage
– Nilani Algiriyage, Commented Mar 27, 2014 at 11:23
@NilaniAlgiriyage All right, I understand. Perhaps use the word "related" next time then :) — BartoszKP
– BartoszKP, Commented Mar 27, 2014 at 11:26

msvalkon · Accepted Answer · 2014-03-27 11:29:33Z

2

Generate the floats, zip the two lists.

>>> country_list = ['China', 'India', 'Japan']
>>> numbers = list(x/10.0 for x in range(1, len(country_list)+1))
>>> zip(country_list, numbers)
[('China', 0.1), ('India', 0.2), ('Japan', 0.3)]

>>> print "\n".join("{} {}".format(x, y) for x, y in _)
China 0.1
India 0.2
Japan 0.3

EDIT: replaced the float(x)*0.1 to a division.

edited Mar 27, 2014 at 11:29

answered Mar 27, 2014 at 11:24

msvalkon

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